Change of banking details for debit order

I have tried 5 (five) times (since Nov 2014) to have the banking details changed for the debit order for 2 contracts which we have with cell c ! UNSUCCESSFULLY !!<br> We have 2 contracts with cell c, debited separately monthly from 2 separate bank accounts . In early 2014 cell c simply decided to put both on the same account - WITHOUT OUR KNOWLEDGE AND AUTHORISATION. Then, I tried to have both transferred to the other account, 5 times, without success! I phoned and emailed them, even asking for the contact details for the CEO of cell c - but they would not give it. I then was in touch with Ayanda, who sent me an email early in January 2015, assuring me that the banking details have now been changed, She even offered us 1GB data free each (for 2 phones) to apologise. I thanked her and added that we did NOT want any freebies, only wished for efficient service. She did not reply, however, THE DEBIT WENT OFF THE WRONG BANK ACCOUNT AGAIN AT THE END OF JANUARY 2015 !!!<br> I am not surprised that someone was so infuriated with CELL C that he had a banner made to let others know how useless they are ! ! We are so disgusted with cell c and will not use them again after contracts expire!